Energy efficient and Green Buildings in Germany · Energy efficient and Green Buildings in Germany . ... • Investors often use certificates as a risk management tool ... energy

Energy efficient and Green Buildings in Germany Dipl.-Ing. Thomas Kleist GREYDOT engineering consultants

GREYDOT engineering consultants

1. Green Building Definition

2. Green Building certificates

3. Green Building market in Germany

4. Green Building examples

5. Conclusion


Dipl.-Ing. Thomas Kleist, GREYDOT engineering consultants

Energy efficient and Green Buildings in Germany


Green Building Definition

Use of local materials?




© Jorge Chapa, Sir Norman Foster

Use of green facades?



Use of energy efficient building equipment?


© greenbuilding directory


© James Law Cybertecture, Bandra Ohm – Mumbai (under construction)

Can modern architecture be green?



© eco green business, Singapore

Are Green Buildings always sustainable?


© Qatar green building council

© Indian green building council


How can we measure sustainability?

Green Building certificates


BNB, BREEAM, DGNB, LEED



Measuring sustainability in different aspects


© Drees & Sommer Advanced Building Technologies, Dr. Peter Mösle


DGNB-System: building equipment related criteria


criteria criteria

ENV1.1 Life Cycle Assessment SOC1.7 Safety and Security

ENV1.2 Local Environmental Impact TEC1.1 Fire Prevention

ENV2.1 Life Cycle Assessment - Primary Energy

TEC1.2 Noise Protection

ENV2.2 Drinking Water Demand and Wastewater Volume

TEC1.4 Adaptability of Technical Systems

ECO1.1 Building-Related Life-Cycle Costs TEC1.9 Sound Emissions

ECO2.1 Flexibility and Adaptability PRO1.4 Sustainability Aspects in Tender Phase

SOC1.1 Thermal Comfort PRO2.1 Environmental Impact of Construction

SOC1.2 Indoor Air Quality PRO2.2 Construction Quality Assurance

SOC1.5 User Control PRO2.3 Systematic Commissioning


DGNB certificates in Germany and Düsseldorf



VDI Society Civil Engineering and Building Services

Green Buildings in Germany

VDI Society Civil Engineering and Building Services (VDI-GBG) Preparation of the new technical standard VDI 6050 Evaluation of the sustainability of the built environment – Training of professionals

• Training sessions for different fields of engineering (architects, HVAC, FM, etc.)

• Reduction of the effort for the engineers to meet the specific requirements of the certification schemes

• Become a certified professional in your field of engineering

• Planned release: end of 2014


© Liz Craig

Does green planning strike the right note?

Green Building market


Commercial property sales in Germany


billio

n €

Source: H. Horster, BNP Paribas Real Estate 2014


Green Building sales in Germany


billio

n €



Single deals and Green Building sales in Germany


billio

n €



Sales of Green Buildings in Germany

Green Building market bi

llion

€


billi

on €

Offices percentage of Green Buildings 18-31%

Retail percentage of Green Buildings

3-20%


What are the drivers? • Most international players have CSR obligations • A widespread CSR commitment is to rent energy-efficient, sustainable buildings

(proved by certificate) • The CSR commitment is strongly related to the rating of the company • The quality and level of the award is decisive rather than the label And what about the investors? • Many investors now prefer green buildings, some are even no longer

considering non-certified offerings • Investors often use certificates as a risk management tool - they assume that

certified buildings can avoid future losses • Among others the Royal Institute of Chartered Surveyors (RICS) recommends

energetic data and aspects of sustainability to be taken into account in appraisal reports

Why is there a share of 20-30% of Green Buildings?



Source: Impact of Energy Efficiency on Real Estate Performance, Dr. Eglitis, IPD 2013

High costs of non Green Buildings

Green Building market ne

t tot

al c

osts

€/m

²*m

onth


Supermarkets & Shopping Center

Green Building examples

REWE market of the future Berlin

mfi AG Pasing Arcade

Munich


DGNB Gold certified

REWE Berlin

wood daylight

geothermal energy use of rainwater

CO2-cooling photovoltaic elements


Use of daylight

REWE Berlin

Daylight simulation to find the optimum size and position of the openings

No artificial light is used during the day


Use of photovoltaic energy

REWE Berlin

Photovoltaic (front roof)

• area 332 m²

• performance 31 kWp

• output 25.000 kWh/a

Photovoltaic (main roof)

• area 1.600 m²

• performance 133 kWp

• output 116.000 kWh/a

> 1/3 of total primary energy demand


Reduction of primary energy demand

REWE Berlin

Reduction about 48%

cooled sales counters

lighting

cooling air conditioning warm water heating

REWE standard market

REWE market of the future

REWE market of the future

CO2 neutrality renewable energies

green electricity

geothermal energy

photovoltaik

Production of energy ~ 40%


DGNB Gold certified

Pasing Arcade Munich


Shopping and residential building



Implementation of an energy effective cooling concept


Central chilled water production

• The main cooling unit is located in the basement.

• The cooling energy is supplied via a central chilled water pipe system.

• In addition to the chillers, geothermal energy (use of groundwater) is used over a heat exchange unit and two ground-water cooled heat pumps.

• Geothermal energy thus can, as a function of the groundwater temperature, provide up to 100 % of the required total cooling energy for the building in summer and at least 70 % in the winter.

• To cover peak loads in winter the chillers work in free cooling mode and they are taken in operation only when needed.

• In this way the mechanical refrigeration can minimize and reduce electricity costs.


Reduction of energy demand



Conclusion

Green Buildings in Germany

• Green Building certificates act a main role in the real estate market in Germany

• Investors will ask for verifiable energy efficient buildings

• Good engineering will lead to cost effective solutions

• The best solution is the optimum between investment costs into technical equipment and operational costs

• Smart energy concepts make the built environment ready for the future


THANK YOU FOR YOUR ATTENTION

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Energy efficient and Green Buildings in Germany · Energy efficient and Green Buildings in Germany . ... • Investors often use certificates as a risk management tool ... energy